David fletcher lucas



UNITED STATES PATENT OFFICE.

DAVID FLETCHER LUCAS, OF NEIV YORK, N. Y.

' PAINT.

SPECIFICATION forming part of Letters Patent No. 615,079, dated November 29, 1898. Application filed June 22, 1897. Serial No. 641,791. (No specimens.)

T [LZZ whmn it may concern.-

Be it known that 1, DAVID FLETCHER LUCAS, a citizen of the United States, residing at New York, (Brooklyn,) in the county of Kings and State of New York, have invented a certain new and useful Paint, of which the following is a full and complete specification, such as will enable those skilled in'the art to which it appertains to make and use the same.

My new and useful composition is designed to produce a paint which will resist heat to the highest obtainable extent, which "will be flexible and not solidify or crack, which will not blister under the heat of the sun, and which will be almost unsusceptible to cold temperatures; and for the purpose of attaining these results in the simplest and most direct manner, Without the use of substances found objectionable or deleterious in paints of this character and without high cost of production, my invention consists of the following ingredients, combined as hereinafter specified: coal-tar, eighty gallons; rosin-oil, four gallons; kerosene or benzin, four gallons; ocher, (preferably gray ocher,) eight pounds; chlorid of sodium, eight pounds; carbonate of soda, (sal-soda,) eight pounds; sulfate of iron, (oopperas,) eight pounds; litharge, four pounds, and Water, ten gallons.

In the first step of the production of the paint I add to eighty gallons of coal-tar eight pounds of ocher (preferably gray ocher) and eight pounds of chlorid of sodium, and after mixing thoroughly I then add four gallons of rosin-oil and four gallons of kerosene or benzin, again mixing the composition thoroughly. I then dissolve eight pounds of sulfate of iron in five gallons of boiling water and dissolve eight pounds of the carbonate of soda in a similar quantity of boiling water, which makes a total of ten gallons employed, and these solutions of the sulfate of iron and the carbonate of soda are then thoroughly mixed. The first combined ingredients and these last combined ingredients of the sulfate of iron and carbonate of soda, together with four pounds of litharge, are then mixed and let stand for about ten days, when the composition is ready for use. Instead of adding the litharge last it may be added to the first combined ingredients before the sulfate of iron and carbonate of soda are added, or the said litharge may first be added to the coaltar.

I find in actual practice that the chlorid of sodium, the carbonate of soda, and the sulfate of iron chemically combine with the other ingredients and that the result is a compositioig incapable of being produced otherwise than by this invention. It is of the greatest importance that the various ingredients of which my composition consists be combined in the proper proportions and manner, as it has been ascertained by actual experiment that a diiferent and inferior result is obtained by other proportions or combinations.

This composition produces a coating or paint which is unsurpassed for the purpose of coating roofs and other structures and for coating boilers, boiler-coverings, &c., and the coating or paint when thus applied is very durable and will not solidify or crack and will not melt or run under ordinary temperatures and will not blister under the heat of the sun, nor will it freeze in the temperature of winter.

When my improved composition is used for coating or painting the bottoms of ships, I employ in connection therewith poisonous substances which are designed to prevent the bottom of the ship from being attacked by ship-worms and other pests of this class. These substances are as follows: Paris-green, four pounds, and arsenious acid, two pounds. In combining these ingredients with those hereinbefore specified the paris-green is added to the ocher and the arsenious acid is boiled with the carbonate of soda, the process being otherwise the same as that hereinbefore set out. I also add in practice to both of the hereinbefore mentioned compositions two pounds of sulfuric ether, which, being highly volatile, does not form a permanent element, and is therefore not included as an element of said compositions; but said ether when first added gives the paint a more consistent and fiuid quality than it has after the ether has been volatilized.

The ingredients of my improved composition may be thoroughly mingled by agitation or in any desired manner, care being taken to follow the instructions hereinbefore given, and said composition as set out in the formula first given constitutes a fireproof and flexible paint, which is particularly adapted for use in coating or painting the roofs of buildings and similar structures, and by adding the paris-grcen and the arsenious acid, as

described, I produce a compound which is un-' iron, eight pounds in boiling water, substantially as set forth.

9. The herein described composition of matter, consisting of a base com posed of coaltar, eight gallons, rosin-oil, four gallons, kerosene, four gallons, oeher, eight pounds, and chlorid of sodium, eight pounds, with which are combined merged solutions of carbonate of soda, eight pounds, and sulfate of iron, eight pounds, in boiling Water, and to which are added four pounds of litharge, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 17th day of June, 1897.

DAVID FLETCHER LUCAS.

Witnesses:

C. GERsT, A. C. VAN BLARCOM. 

